228568128 has 112 divisors (see below), whose sum is σ = 645200640. Its totient is φ = 71163904.

The previous prime is 228568117. The next prime is 228568133. The reversal of 228568128 is 821865822.

228568128 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 228568128.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779950 + ... + 780242.

It is an arithmetic number, because the mean of its divisors is an integer number (5760720).

Almost surely, 2^228568128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228568128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322600320).

228568128 is an abundant number, since it is smaller than the sum of its proper divisors (416632512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228568128 is a wasteful number, since it uses less digits than its factorization.

228568128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 554 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The square root of 228568128 is about 15118.4697638352. The cubic root of 228568128 is about 611.4184744765.

The spelling of 228568128 in words is "two hundred twenty-eight million, five hundred sixty-eight thousand, one hundred twenty-eight".